Toothbrush



FIG. 1 is a front perspective view of the design of a toothbrush;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a top plan view thereof.

CLAIM The ornamental design for a toothbrush, as shown and described.